Feank pinch



(No Model.)

I F. PINOH.

ROD PACKING.

No. 382,187. Patented May 1, 1888 v 0 F30 l;

two faces 0 c.

NITED STATES PATENT Fries.

FRANK PINOH, OF SIDNEY, ASSIGNOB TO THE EXOELSIOR METALLIC PACK- ING COMPANY, OF MIDDLETOWN, NEW YORK.

ROD-PACKING.

srncrrrcA-rron forming part of Letters Patent No. 382,187, dated May 1, 1888.

Application filed December 5. 1887. Serial No. 257,032. (No model.)

To aZZ whom it 12mg) concern:

Be it known that I, FRANK PINCH, of Sidney, in the county of Delaware and State of New York, have invented certain new and useful Improvements in Adjustable Packing for Piston and other Rods, of which the following. is aspecification, reference being had to the accompanying drawings, and to the letters 0 reference marked thereon.

The object of the invention is to make a perfectly steam or water tight joint by means of metallic ring packing; and theinvention consists in certain details of construction of the ring packing, as will be fully set forth in the specification and claim.

In the accompanying drawings, Figure 1 is a longitudinal section of the forward end of a cylinder, showing the stuffing-box, gland, rod, and packing-rings. Fig. 2 is a perspective view of the packing-rings, and Figs. 3 and 4 are views of the packing-rings detached.

Similar letters of reference indicate similar parts in the respective figures.

A is the cylinder-head having an ordinary stuffing-box, a.

B is the piston-rod.

O is a gland or casing, having a front flange, b, corresponding in shape with the frontflange c of the stuffing-box, and is connectedto said flange c by bolts, in the usual manner. The interior of the casing O is trued out upon the D is a ring having a peripheral opening, d, and provided on its interior with a right angled recess, (1, in which the 'ring F fits snugly,the two rings being so constructed that when in position their outward faces shall be flush with each other. The ring F is also out through, as shown, the two ends f f thus formed being cut away on opposite sides to form rabbetsf f", into which the endsff are respectively adapted to fit and overlap. As the insides of the two rings wear away, the pressure of the steam on the outside of the ring D will gradually force the ends formed by the cuts in the peripheries of the two rings toward each other, and thus always keep the rings closed tightly upon the rod. The ring F is also provided with a lug or projection, g,

on its outer face, which projects outwardly into the opening d in the ring D, and serves to prevent the ring F from turning around so as to bring the open portions of the two rings together.

The flat faces of the ringsD and F fit against the trued face a of the casing O and make a steam'tight joint. The opposite end of the ring D is beveled, as shown ate, and against said beveled face a second beveled ring, E, having a correspondingly-beveled face, fits. 69

G is a spring within the stuffing-box a and surrounding the piston'rcd for the purpose of forcing the rings D, E, and F against the face 0 of the casing O. A packing, e, is placed between the stuffingbox and easing O.

Sufficient space is left between the annular packing-rings and the casing G to allow for a slight lateral motion of the piston-rod inside of the casing to permit steam to reach the outside of the packingrings to close them upon 70 the rod.

I am aware that packing-rings having an interior right'angled recess for the reception of another packing-ring have been made heretofore. I am also aware that packing-rings having overlapping ends have been heretofore made, and I do not therefore claim such broadly; but, 7

Having described my invention, I claim- In a metallic ring packing,the combination,

with an outer ring having a peripheral opening and an interior right-angled recess, of an inner ring resting in said recess and having a lug on its periphery projecting outwardly into the peripheral opening in the outer ring, the 8 5 said inner ring being cut through, and the ends thus formed cut away to form rabbets, into each of which the opposite end of said ring is adapted to fit, and thus cause the ends to overlap, substantially as specified.

In testimony whereof I have hereunto set my hand and seal.

FRANK PINCH. [L. s.]

Witnesses:

EDWIN Cause, 0. B. THOMPSON, 

